Persistently strong Indonesian Throughflow during marine isotope stage 3: evidence from radiogenic isotopes
Highlights: • First ITF reconstruction combining detrital and authigenic isotope signatures. • At the core site signatures of surface water cannot be separated from bottom water. • Intermediate to deep waters remain unchanged in western Timor Sea during MIS3. • Clay-size fraction of the sediment ind...
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Online Access: | https://oceanrep.geomar.de/id/eprint/27641/ https://oceanrep.geomar.de/id/eprint/27641/1/Stumpf%20et.al.pdf https://doi.org/10.1016/j.quascirev.2015.01.029 |
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ftoceanrep:oai:oceanrep.geomar.de:27641 2023-05-15T18:00:45+02:00 Persistently strong Indonesian Throughflow during marine isotope stage 3: evidence from radiogenic isotopes Stumpf, Roland Kraft, Steffanie Frank, Martin Haley, Brian Holbourn, Ann Kuhnt, Wolfgang 2015-03-15 text https://oceanrep.geomar.de/id/eprint/27641/ https://oceanrep.geomar.de/id/eprint/27641/1/Stumpf%20et.al.pdf https://doi.org/10.1016/j.quascirev.2015.01.029 en eng Elsevier https://oceanrep.geomar.de/id/eprint/27641/1/Stumpf%20et.al.pdf Stumpf, R., Kraft, S., Frank, M. , Haley, B., Holbourn, A. and Kuhnt, W. (2015) Persistently strong Indonesian Throughflow during marine isotope stage 3: evidence from radiogenic isotopes. Quaternary Science Reviews, 112 . pp. 197-206. DOI 10.1016/j.quascirev.2015.01.029 <https://doi.org/10.1016/j.quascirev.2015.01.029>. doi:10.1016/j.quascirev.2015.01.029 info:eu-repo/semantics/restrictedAccess Article PeerReviewed 2015 ftoceanrep https://doi.org/10.1016/j.quascirev.2015.01.029 2023-04-07T15:17:43Z Highlights: • First ITF reconstruction combining detrital and authigenic isotope signatures. • At the core site signatures of surface water cannot be separated from bottom water. • Intermediate to deep waters remain unchanged in western Timor Sea during MIS3. • Clay-size fraction of the sediment indicates a persistently strong ITF during MIS3. Abstract: The Indonesian Throughflow (ITF) connects the western Pacific Ocean with the eastern Indian Ocean, thus forming one of the major near surface current systems of the global thermohaline circulation. The intensity of the ITF has been found to be sensitive to changes in global ocean circulation, fluctuations in sea level, as well as to the prevailing monsoonal conditions of the Indonesian Archipelago and NW Australia. This study presents the first reconstruction of ITF dynamics combining radiogenic isotope compositions of neodymium (Nd), strontium (Sr), and lead (Pb) of the clay-size detrital fraction to investigate changes in sediment provenance, and paleo seawater Nd signatures extracted from the planktonic foraminifera and authigenic Fe–Mn oxyhydroxide coatings of the marine sediments focussing on marine isotope stage 3 (MIS3). Sediment core MD01-2378 was recovered within the framework of the International Marine Global Change Study (IMAGES) and is located in the area of the ITF outflow in the western Timor Sea (Scott Plateau, 13° 04.95′ S and 121° 47.27′ E, 1783 m water depth). In order to produce reliable seawater signatures, several extraction methods were tested against each other. The results of the study show that at this core location the extraction of surface water Nd isotope compositions from planktonic foraminifera is complicated by incomplete removal of contributions from Fe–Mn oxyhydroxides carrying ambient bottom water signatures. The bottom water Nd isotope signatures reliably obtained from the sediment coatings (average εNd = −5.0) document an essentially invariable water mass composition similar to today throughout the entire MIS3. The radiogenic ... Article in Journal/Newspaper Planktonic foraminifera OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) Indian Pacific Quaternary Science Reviews 112 197 206 |
institution |
Open Polar |
collection |
OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) |
op_collection_id |
ftoceanrep |
language |
English |
description |
Highlights: • First ITF reconstruction combining detrital and authigenic isotope signatures. • At the core site signatures of surface water cannot be separated from bottom water. • Intermediate to deep waters remain unchanged in western Timor Sea during MIS3. • Clay-size fraction of the sediment indicates a persistently strong ITF during MIS3. Abstract: The Indonesian Throughflow (ITF) connects the western Pacific Ocean with the eastern Indian Ocean, thus forming one of the major near surface current systems of the global thermohaline circulation. The intensity of the ITF has been found to be sensitive to changes in global ocean circulation, fluctuations in sea level, as well as to the prevailing monsoonal conditions of the Indonesian Archipelago and NW Australia. This study presents the first reconstruction of ITF dynamics combining radiogenic isotope compositions of neodymium (Nd), strontium (Sr), and lead (Pb) of the clay-size detrital fraction to investigate changes in sediment provenance, and paleo seawater Nd signatures extracted from the planktonic foraminifera and authigenic Fe–Mn oxyhydroxide coatings of the marine sediments focussing on marine isotope stage 3 (MIS3). Sediment core MD01-2378 was recovered within the framework of the International Marine Global Change Study (IMAGES) and is located in the area of the ITF outflow in the western Timor Sea (Scott Plateau, 13° 04.95′ S and 121° 47.27′ E, 1783 m water depth). In order to produce reliable seawater signatures, several extraction methods were tested against each other. The results of the study show that at this core location the extraction of surface water Nd isotope compositions from planktonic foraminifera is complicated by incomplete removal of contributions from Fe–Mn oxyhydroxides carrying ambient bottom water signatures. The bottom water Nd isotope signatures reliably obtained from the sediment coatings (average εNd = −5.0) document an essentially invariable water mass composition similar to today throughout the entire MIS3. The radiogenic ... |
format |
Article in Journal/Newspaper |
author |
Stumpf, Roland Kraft, Steffanie Frank, Martin Haley, Brian Holbourn, Ann Kuhnt, Wolfgang |
spellingShingle |
Stumpf, Roland Kraft, Steffanie Frank, Martin Haley, Brian Holbourn, Ann Kuhnt, Wolfgang Persistently strong Indonesian Throughflow during marine isotope stage 3: evidence from radiogenic isotopes |
author_facet |
Stumpf, Roland Kraft, Steffanie Frank, Martin Haley, Brian Holbourn, Ann Kuhnt, Wolfgang |
author_sort |
Stumpf, Roland |
title |
Persistently strong Indonesian Throughflow during marine isotope stage 3: evidence from radiogenic isotopes |
title_short |
Persistently strong Indonesian Throughflow during marine isotope stage 3: evidence from radiogenic isotopes |
title_full |
Persistently strong Indonesian Throughflow during marine isotope stage 3: evidence from radiogenic isotopes |
title_fullStr |
Persistently strong Indonesian Throughflow during marine isotope stage 3: evidence from radiogenic isotopes |
title_full_unstemmed |
Persistently strong Indonesian Throughflow during marine isotope stage 3: evidence from radiogenic isotopes |
title_sort |
persistently strong indonesian throughflow during marine isotope stage 3: evidence from radiogenic isotopes |
publisher |
Elsevier |
publishDate |
2015 |
url |
https://oceanrep.geomar.de/id/eprint/27641/ https://oceanrep.geomar.de/id/eprint/27641/1/Stumpf%20et.al.pdf https://doi.org/10.1016/j.quascirev.2015.01.029 |
geographic |
Indian Pacific |
geographic_facet |
Indian Pacific |
genre |
Planktonic foraminifera |
genre_facet |
Planktonic foraminifera |
op_relation |
https://oceanrep.geomar.de/id/eprint/27641/1/Stumpf%20et.al.pdf Stumpf, R., Kraft, S., Frank, M. , Haley, B., Holbourn, A. and Kuhnt, W. (2015) Persistently strong Indonesian Throughflow during marine isotope stage 3: evidence from radiogenic isotopes. Quaternary Science Reviews, 112 . pp. 197-206. DOI 10.1016/j.quascirev.2015.01.029 <https://doi.org/10.1016/j.quascirev.2015.01.029>. doi:10.1016/j.quascirev.2015.01.029 |
op_rights |
info:eu-repo/semantics/restrictedAccess |
op_doi |
https://doi.org/10.1016/j.quascirev.2015.01.029 |
container_title |
Quaternary Science Reviews |
container_volume |
112 |
container_start_page |
197 |
op_container_end_page |
206 |
_version_ |
1766169961035726848 |